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Luminescent Cyclometalated Iridium(III) Polypyridine Complexes Containing a Thiourea Moiety: Synthesis, Characterization, Photophysics, Electrochemistry and Anion‐Binding Properties
Author(s) -
Lo Kenneth KamWing,
Lau Jason ShingYip,
Lo David KaKit,
Lo Larry TsoLun
Publication year - 2006
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200600428
Subject(s) - chemistry , thiourea , moiety , electrochemistry , iridium , luminescence , medicinal chemistry , stereochemistry , organic chemistry , catalysis , electrode , physics , optoelectronics
A series of new luminescent cyclometalated iridium(III) polypyridine thiourea complexes [Ir(N‐C) 2 (N‐N)](PF 6 ) [HN‐C =2‐phenylpyridine (Hppy), N‐N = N ‐ethyl‐ N′ ‐1,10‐phenanthrolin‐5‐yl thiourea (phen‐TU‐Et) ( 1a ), N ‐phenyl‐ N′ ‐1,10‐phenanthrolin‐5‐yl thiourea (phen‐TU‐Ph) ( 1b ), N ‐(1‐adamantanemethyl)‐ N′ ‐1,10‐phenanthrolin‐5‐yl thiourea (phen‐TU‐MeA) ( 1c ); HN‐C = 7,8‐benzoquinoline (Hbzq), N‐N = phen‐TU‐Et ( 2a ), phen‐TU‐Ph ( 2b ), phen‐TU‐MeA ( 2c ); HN‐C = 2‐phenylquinoline (Hpq), N‐N = phen‐TU‐Et ( 3a ), phen‐TU‐Ph ( 3b ), phen‐TU‐MeA ( 3c )] have been synthesized and characterized. The photophysical and electrochemical properties of these complexes have been investigated. On the basis of the photophysical and electrochemical data, the nature of the emissive states has been assigned. The thiourea moieties of the complexes allow them to act as receptors for anions; the binding of OAc – , F – , and H 2 PO 4 – to the complexes has been investigated by emission titrations. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)